Internal-combustion engine



H. L. IVIEEDENi INTERNAL COMBUSTION ENGINE. APPLICATION FILED mic. 31. 1920.

LM @,946., Patented Mar. 28, mi

INVENTOR.

entre lerares HERBERT L. MEEDEB, @F DENVER, CQLURAJU, ASSIAGNOR @THREE-EIGHTHS TQ.

LEWIS S. HALL .AND TWO-EIGHTHS T0 JHN HTGLIS, BQTE OF DENVER, CGL@- lnvrnaiven-eomassieren miente.

. mme

Speeication of Letters Patent. EPwtmtfdl Mair..- 2S,

pplcation filed December 31 192e. Serial No. 434,266;

To all whom it may concern.'

Be it known that l, HERBERT L. MEEDER, a. citizen of the United States, residin at the city and county of Denver, and Colorado, have invented certain new and useful Improvements in Internal-Combustion., Engines; and l do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to niake and use the saine, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

The object of this invention .is to 'provide a cylinder construction for internal combustion engines by means of which dilution of the lubricating oil in the crank case by gases escaping past the piston rings will be avoided.

rlhis is accomplished by means of a partition which separates and seals the crank case from the spaces below the piston, and by connecting the spaces below each pair of pistons, andin turn connecting said spaces lwith the atmosp ere by means ot a tube in order to lead ofi the gases which get by the piston rings.` With' this construction the combined space below two adjacent pistons, which are at opposite extremities of their strokes, remains constant, the air in said spaces being forced back and forth through the connection from beneath one piston to the space beneath the other.

ln the drawings:

Fig. 1 is a vertical section through one cylinder and the crank case, showing the means for the escape of the gases which have worked past the piston, and the means for oiling;

F ig. 2 is a vertical section at right angles to that of Figure l, showing 'two adjacent cylinders and their connections.

. A conventional crank case l0 carries the cylinder-block 12 provided with the usual water jacket 14, spark plugs l5 and valves 16. Within each cylinder 12 a piston 18 is mounted, the pistons being provided with the usual-'rings 20. Each piston 18 is provided adjacent its central portion -with a dependent skirt orisleeve 22, which closely lits an upstanding sleeve 24 carrying rings' 25. A piston rod 26 extends upwardly through the sleeve 24 and is secured to the piston as at 27. rlhis rod 26 has a longi tate of the other,

lon itudinal axis.

' tudinally extending passage 28 which is in communication with the space above the sleeves 24 and below the piston 18 by means of an aperture 30, which relieves compres- Y sion or lsuction withinA said space.

With this "arrangement a space 32 is provided beneath each piston 18 and above the partitioning wall 36, which separates said space 32 from the crank caseand which carries the upstanding sleeve 24. A passage 34 connects the two spaces 32 of adjacent cylinders so that the vair may be forced through said passage from one cylinder to as the pistonsreciprocate. rl'Lhe two pistons inthe adjacent cylinders are oppositely disposed, so that when one piston is at one extremity of its stroke, the other piston. is at the opposite extremity of its stroke. n this manner the combined spaces beneath the two pistons is constant. The rings 25 on the upstanding sleeves 24 cooperate with the depending skirts 22 and :prevent escape of air or gas from the spaces vdanger of drawing outside air laden with dust or grit into said spaces. ln this manner the cylinder walls are kept clean and scoring by dust or grit is prevented. rlthe pipe 35 may be inserted in the side of the cylinder, as indicated in Figure l, or it may penetrate the cylinder wall at the passage 34, as indicated in Figure 2.

A plate 38 is positioned between the partitioning wall 36 and the crank case l0 and is provided with a depending guidingisleeve 40 for each piston 18, which guides the ring 42 carrying wrist pin 44, which. connects the piston rod 26 with the connecting rod 45 driven from the crank shaft 46. ln this manner each rod 26 reciprocates'on a fixed or the purpose of oiling the piston 18 and the skirt 22, the cylinder wall 12, the end of the duct 50 projecting a short distance beyond the wall, as seen in Figure l, so that the drops of oil an oil duct 50 is led into may be taken from the tip of the duct by the rushing air as it moves from one cylinder to the other. This duct 50 is supplied by any suitable means, such as from; a reservoir 52 controlled by a needle valve 54. Oil is car-4 ried up from the crank case through a pipe 55 and is supplied by means of a pump 56 which may be conveniently operated by a cam on the cam shaft 58, which controls the push rod 60 for the valve 16. The overflow pipe 62 conveniently leads to a ledge 64 on the guide 65 for the push rod 60, for the purose of lubricating the latter.

From the foregoing it will be seen that I have provided comparatively simple and highly efficient means for preventing dilution of the lubricating oil in a crank case by gases which work past the piston rings, and that I have provided such a device with efficient oiling means and means for escape of said gases, which will preventy the entrance Y of dust or 'grit to the cylinders tons in opposite directions I claim: 1. In an internal combustion engine, a pair of cylinders, a Apiston reciprocable in 'each cylinder, means to reciprocate the pistons is opposite directions from one another, a crank 'case below the cylinders, vand means separating the spaces below the pistons from the chamber within the crank case, said cylinders having an opening connecting the spaces below the pistons with each other.

2. In aninternal combustion engine, a pair of cylinders, a piston reciprocable/ in each cylinder, means to reciprocate the pistons in opposite directions from one another, a crank case below the cylinders, means separating the spaces below the pistons from the chamber within the crank case, said cylinders having -an opening connecting the spaces below the pistons with each other, 'and an opening connecting said spaces with theI atmosphere.

3. In an .internal combustion engine, a pair of cylinders, a piston reciprocable in each cylinder, means to reciprocate the isfrom one anot er,

a crank case below the cylinders, means separatingthe spaces below the pistons from the chamber within the crank case, said cylinders having an opening connecting the spaces below the pistons with each other, and a tube leading to said cylinders and connecting said spaces with the atmosphere.

4. In an internal combustion engine, a pair of cylinders, a piston reciprocable in each cylinder, means to reciprocate the pistons in opposite directions from one another, a crank case below the cylinders, `means separating the spaces below` the pistons from the chamber within the crank case, said cylinders having an opening connecting the spaces below the istons with each other, and an oil tube leading to said cylinders to beneath said pistons to supply said spaces with oil. .5. In an internal combustion engine, a crank case a pair of cylinders, pistons in said cylinders whereby are provided above the pistons, means between the crank case and the spaces beneath the pistons to separate and seal said spaces from the crank case, means projecting through said separating means fromv the crank case into engagement with the pistons to reciprocate the same in opposite directions from one another, tween said spaces providing communication with each other. 6. In an internal combustion engine, a pair of cylinders, a piston reciprocable in each cylinder, means to reciprocate the pistons in opposite directions from one another, a crank case below thel cylinders, and means separating the Space below the pistons from the chamber within the crank case, said cylinders having an opening connecting the spaces below the pistons with each other, and an oil tube projecting into said opening whereby oil may be taken from the tip of said tube by the passing air currents.

In testimony whereof I affix my signature.

. HERBERT L. MEEDER.

explosion ch'ambers and a connection be- 

